Signaling whistle



May 24, 1932. OTTO 1,859,408

SIGNALING WHIS TLE Filed Feb. 6, 1952 2 Sheets-Sheet 2 Inventor Patented May 24, 1932 HENRY J. OTTO, or 'MOBERLY, ivussonlu' SIGNALING WHISTLE Application filed February 6, 1932. Serial No. 591,411.

This invention relates to an audible signal for vehicles particularly aeroplanes, automobiles and the like.

More specifically stated, the invention is embraced in a simple whistle construction embodying a manually controlled valve permitting the blast or current of air passing through the structure to produce the audible whistle sound.

I am aware of the fact that the idea of using a whistle having an air collecting and concentrating introductory device or funnel is not broadly new and I therefore predicate the novelty of this invention upon the specific selection of details and the unified arrangement thereof whereby simplicity in construction is assured and effective signaling results attained.

In the drawings:

Figure 1 is a plan View of the audible signaling whistle structure designed in accord ance with the present invention.

Figure 2 is a front end elevation on an enlarged scale.

Figure 3 is a side elevational view of Figure 1.

Figure 4 is a central longitudinal sectional view through the structure seen in Figure 1.

In the drawings the numeral 5 designates a relatively stationary support which may be a part of an aeroplane or other mobile vehicle; The whistle proper comprises an open ended tube 6 of appropriate proportion held in place by appropriate supporting brackets 7. At a predetermined point is an inwardly protruding indentation 8 located within the vicinity of the vent or slot 9 and on the interior of the tube within the vicinity of this vent is an appropriately shaped bafiie element 10 which produces the audible sound or whistle effect in a well known manner. The air is fed into the intake end of the tube 6 by way of an introductory concentrating funnel 11. This is of pyramidal or tapered form and has its top substantially open and provided with inturned stop flanges 12. The numeral 18 designates a valve plate which is hingedly mounted in place as indicated at 14. This is allowed to drop down to the closing position represented in Figure 4 and is capable of being elevated by mechanical means to allow the air to rush in at the desired velocity. The free edge portion of the plate is provided with a socket 15 which serves as a keeper for the reception of the free end portion of a lifting finger 16. This finger is carried by a rocker shaft 17 journalled in bearings in extension ears 18 on the upper endsof retaining straps 19. The straps are fastened to the supporting boards 5. At one end of the rocker shaftis an actuating crank or arm 20 with which the pull cord 21 is connected. At the opposite end is a similar arm 22 to which a coiled return spring 23 is connected, such spring being anchored on the funnel in any desired manner. Thus the spring serves to hold the valve plate normally closed.

It is evident that the device is placed on the vehicle so that the funnel faces the direction of forward movement of the vehicle. Hence by pulling down on the string or cord 21 the rock shaft 17 is oscillated in a manner to actuate the finger 16. This in turn operates the valve plate 13 through the medium of the socket 16. The valve plate being thus opened the air currents are allowed to rush into the whistle and to produce the desired shrill audible signaling sound and effect. When the pull cord is released the spring means serves to return the valve to normal closed position at which time the free edge portion rests against the buffer or cushioning pad 24.

It is thought that the description taken in connection with the drawings will enable a clear understanding of the invention to be had. Therefore, a more lengthy description is thought unnecessary.

While the preferred embodiment of the invention has been shown and described, it is to be understood. that minor changes coming within the field of invention claimed may be resorted to if desired.

Having thus described my invention, what I claim as new is:

1. In a structure of the class described, in combination a whistle having a tubular body, an air intake funnel at the intake end of the tubular body of said whistle, said funnel having a plate hingedly mounted therein to serve as an air control valve, and manually manipulated actuating means for said valve.

2. In a structure of the class described, in combination a Whistle having a tubular body, an air intake funnel at the intake end of the tubular body of said whistle, said funnel having a plate hingedly mounted therein to serve as an air control valve, and manually manipulated actuating means for said valve,

comprising an oscillatory rocker shaft I mounted in bearings on the funnel, a crank pressed deflector, an obstruction in said tube within the vicinity of said vent and serving as a baifle to produce the desired whistle eflect, an enlarged tapered box like funnel secured to the intake end of said tube, the upper Wall thereof being substantially open and formed with inturned stop flanges, a

hingedly mounted plate cooperable with said flanges and normally occupying an inclined closlng pos1t1on, a rocker shaft mounted 1n bear ngs on sand funnel, return spring means connected with the rocker shaft for holding the valve plate normallyclosed, a pull cord T connected therewith for actuating the shaft,

and a finger carried by said shaft and operatively connected with the valve plate.

In testimony whereof I aflix my signature.

HENRY J OTTO. 

